Added the Sensor Matter component.

Author: photonstorm

v3/src/physics/matter-js/components/Sensor.js

@@ -0,0 +1,17 @@
+var Sensor = {
+
+    setSensor: function (value)
+    {
+        this.body.isSensor = value;
+
+        return this;
+    },
+
+    isSensor: function ()
+    {
+        return this.body.isSensor;
+    }
+
+};
+
+module.exports = Sensor;